Set of stackable chess pieces



FIG. 1 is a front perspective of a set of stackable chess pieces showing my new design;

FIG. 2 is a rear perspective thereof;

FIG. 3 is a view of the chess pieces in a stacked horizontal arrangement; and

FIG. 4 is a view of the chess pieces in a stacked vertical arrangement. 

The ornamental design for a set of stackable chess pieces, as shown and described. 